High-Speed Counter Inputs - Omron CJ1M-CPU21 Operation Manual

Built-in Inputs
Specifications
6-1-4

High-speed Counter Inputs

Overview
Item
Number of inputs
Allocated data area
Count pulse detection
Count method
Count range
Response frequency
Storage priority for the inter-
rupt input (counter mode) PVs
Interrupt Task Numbers
Input bit
CIO 2960 bit 00
CIO 2960 bit 01
CIO 2960 bit 02
CIO 2960 bit 03
This function counts pulse signals input at the built-in input terminals.
Any one of the following input signals can be selected as the counter input
mode.
• Differential phase inputs (4x)
• Pulse + direction inputs
• Up/Down pulse inputs
• Increment pulse inputs
The present counts are contained in the High-speed Counter PVs (A270 to
A273.)
• The counting mode can be set to linear mode or ring mode counting.
• The counter reset method can be set to Phase-Z signal + Software reset
or Software reset.
• An interrupt task can be started when the high-speed counter PV meets
the preset comparison condition. Either one of these comparison meth-
ods can be used:
• Target value comparison
• Range comparison
• Counting can be stopped temporarily with the counters Gate Bit (Gate
function.)
Specifications
4 inputs (The 4 input terminals are shared with the
quick-response inputs, high-speed counter (Phase-Z
signal), and general-purpose inputs.)
CIO 2960 bits 00 to 03
Up differentiation or down differentiation
Incrementing or decrementing (Set with the
MSKS(690) instruction.)
0001 to FFFF hex (16 bits)
(The SVs are set in Auxiliary Area words A532 to
A535.)
Single phase: 1 kHz x 4 inputs
A536 to A539
•PVs can be read with the PRV(881) instruction.
•PVs can be changed with the INI(880) instruction.
Note
•PVs are retained when the power is turned ON.
•PVs are cleared when operation starts.
•PVs are refreshed when a interrupt occurs.
•PVs are refreshed when the INI(880) instruction is
executed to change the PV.
Interrupt task number
140
141
142
143
Section 6-1
129